Sash is the Swing equivalent of a JSplitPane. It is a widget that can be dragged to resize two areas in a GUI.
Here’s an example of a Sash in a JFace application.
Category.java:
import java.util.*;
public class Category {
private String name;
private Category parent;
private ArrayList categories = new ArrayList();
private ArrayList links = new ArrayList();
public Category(String name, Category parent) {
this.name = name;
this.parent = parent;
}
public void addSubCategory(Category category) {
categories.add(category);
}
public void addLink(Link link) {
links.add(link);
}
public ArrayList getSubCategories() {
return categories;
}
public ArrayList getLinks() {
return links;
}
public boolean hasSubCategories() {
return categories.size() > 0;
}
public boolean hasLinks() {
return links.size() > 0;
}
public String getName() {
return name;
}
public Category getParent() {
return parent;
}
}
Link.java:
public class Link {
private String url;
public Link(String url) {
this.url = url;
}
public String getUrl() {
return url;
}
}
CategoryTreeContentProvider.java:
import org.eclipse.jface.viewers.*;
import java.util.*;
public class CategoryTreeContentProvider implements ITreeContentProvider
{
public Object[] getChildren(Object element) {
Category category = (Category) element;
System.out.println(category.getName());
ArrayList children = new ArrayList();
children.addAll(category.getSubCategories());
children.addAll(category.getLinks());
if (children.size() == 0) {
return new Object[0];
}
return children.toArray();
}
public Object[] getElements(Object element) {
return getChildren(element);
}
public boolean hasChildren(Object element) {
if (element instanceof Category) {
Category category = (Category) element;
return category.hasSubCategories() || category.hasLinks();
}
return false;
}
public Object getParent(Object element) {
if (element instanceof Category) {
return ((Category) element).getParent();
}
return null;
}
public void dispose() {
}
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
}
}
CategoryTreeLabelProvider.java:
import org.eclipse.jface.viewers.*;
public class CategoryTreeLabelProvider extends LabelProvider
{
public String getText(Object element) {
if (element instanceof Category) {
return ((Category) element).getName();
}
else if (element instanceof Link) {
return ((Link) element).getUrl();
}
return "" + element;
}
}
Main.java:
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.window.ApplicationWindow;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.SashForm;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.ole.win32.OLE;
import org.eclipse.swt.ole.win32.OleAutomation;
import org.eclipse.swt.ole.win32.OleControlSite;
import org.eclipse.swt.ole.win32.OleFrame;
import org.eclipse.swt.ole.win32.Variant;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
public class Main extends ApplicationWindow
{
private Category rootCategory;
private OleAutomation automation = null;
public Main() {
super(null);
// statically create categories
rootCategory = new Category("Java", null);
Category j2seCategory = new Category("J2SE", rootCategory);
Link link = new Link("http://java.sun.com/j2se/");
j2seCategory.addLink(link);
Category j2eeCategory = new Category("J2EE", rootCategory);
link = new Link("http://java.sun.com/j2ee/");
j2eeCategory.addLink(link);
Category j2meCategory = new Category("J2ME", rootCategory);
link = new Link("http://java.sun.com/j2me/");
j2meCategory.addLink(link);
rootCategory.addSubCategory(j2seCategory);
rootCategory.addSubCategory(j2eeCategory);
rootCategory.addSubCategory(j2meCategory);
}
protected Control createContents(Composite parent) {
SashForm sashForm = new SashForm(parent, SWT.HORIZONTAL | SWT.NULL);
TreeViewer treeViewer = new TreeViewer(sashForm);
treeViewer.setContentProvider(new CategoryTreeContentProvider());
treeViewer.setLabelProvider(new CategoryTreeLabelProvider());
treeViewer.setInput(rootCategory);
createIEControl(sashForm);
treeViewer.addSelectionChangedListener(new ISelectionChangedListener() {
public void selectionChanged(SelectionChangedEvent event) {
IStructuredSelection selection = (IStructuredSelection) event.getSelection();
Object selectedObject = selection.getFirstElement();
if (selectedObject instanceof Link) {
goUrl(((Link) selectedObject).getUrl());
}
}
});
return sashForm;
}
public static void main(String []args) {
Main main = new Main();
main.setBlockOnOpen(true);
main.open();
Display.getCurrent().dispose();
}
private void createIEControl(Composite parent) {
OleFrame frame = new OleFrame(parent, SWT.BORDER);
FormData formData = new FormData();
formData.top = new FormAttachment(0, 10);
formData.left = new FormAttachment(0, 100);
formData.right = new FormAttachment(100, 0);
formData.bottom = new FormAttachment(100, -10);
frame.setLayoutData(formData);
OleControlSite controlSite = new OleControlSite(frame, SWT.NONE, "Shell.Explorer");
controlSite.doVerb(OLE.OLEIVERB_SHOW);
automation = new OleAutomation(controlSite);
int[] rgdispid = automation.getIDsOfNames(new String[]{"GoHome"});
int dispIdMember = rgdispid[0];
automation.invoke(dispIdMember);
}
public void goUrl(String url) {
int[] rgdispid = automation.getIDsOfNames(new String[]{"Navigate"});
int dispIdMember = rgdispid[0];
Variant[] rgvarg = new Variant[1]; // this is the URL parameter
rgvarg[0] = new Variant(url);
Variant pVarResult = automation.invoke(dispIdMember, rgvarg);
}
}
